The NIH Intramural Research Program (IRP) is comprised of ~1200 tenured and tenure track investigators.  Many of the NIH Investigators have expressed their interest in training future scientists by participating in the GPP; each completing an Approval of Participation process for their Institute-Center.  A complete list of the NIH investigators participating in the GPP is contained within the searchable database (see link below).
 
GPP Database of Investigators

In addition to the list of approved investigators, several NIH resources may be used to identify investigators with similar research interests.  However, investigators identified through the following links may need to complete the Approval of Participation before accepting a graduate student:

NIH Intramural Annual Reports (NIDB Resources)

NIH Institute-Center WebPages

NIH Institute-Center WebPages of the Intramural Research Program (IRP)

• NCI – National Cancer Institute
  • Center for Cancer Research
  • Division of Cancer Epidemiology & Genetics
  • NCI-Frederick
• NEI – National Eye Institute
• NHLBI – National Heart, Lung, and Blood Institute 
• NHGRI – National Human Genome Research Institute
• NIA – National Institute on Aging
• NIAAA – National Institute on Alcohol Abuse and Alcoholism
• NIAID – National Institute of Allergy and Infectious Diseases
• NIAMS – National Institute of Arthritis and Musculoskeletal and Skin Diseases
• NICHD – National Institute of Child Health and Human Development
• NIDA – National Institute on Drug Abuse
• NIDCD – National Institute on Deafness and Other Communication Disorders
• NIDCR – National Institute of Dental and Craniofacial Research
• NIDDK – National Institute of Diabetes and Digestive and Kidney Diseases
• NIEHS – National Institute of Environmental Health Sciences
• NIMH – National Institute of Mental Health
• NINDS – National Institute of Neurological Disorders and Stroke
• NINR – National Institute of Nursing Research
• NLM/NCBI – National Center for Biotechnology Information / National Library of Medicine
• VRC – Vaccine Research Center
  

NIH Special Interest Groups

NIH Neuroscience